What is hydrophobically modified polyacrylamide?

Hydrophobically modified polyacrylamides attract great interest because of their possible applications in various industrial areas, including oil recovery, paints, pharmaceuticals, cosmetics, and food. However, chemically-crosslinked analogs of such polymers as well as their toughness vs hydrophobicity trends draw much less attention .

What are hydrophobically associating polyacrylamides (hapams)?

Of particular interest in this class are hydrophobically associating polyacrylamides (HAPAMs), derived from polyacrylamide by introducing a relatively low amount (generally less than 2 mol%) of hydrophobic pendent groups .

What is the standard state of polyacrylamide?

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). ?) Polyacrylamide (abbreviated as PAM or pAAM) is a polymer with the formula (-CH 2 CHCONH 2 -). It has a linear-chain structure. PAM is highly water-absorbent, forming a soft gel when hydrated.

Is polyacrylamide water soluble?

Polyacrylamides are high molecular weight water soluble or swellable polymers formed from acrylamide or its derivatives. Their glass transition temperature is well above room temperature (> 400 K). Polyacrylamide PAM is currently the most widely used synthetic organic polymer flocculant, and sometimes it is also used as a coagulant aid.

How are hydrophobically modified polyacrylamide hydrogels prepared?

In the present work, a series of hydrophobically modified polyacrylamide (PAAm) hydrogels were prepared via micellar crosslinking copolymerization of acrylamide (AAm) monomer and N, N ′-methylenebis (acrylamide) (BAAm) crosslinker in the presence of a hydrophobic comonomer.

Why is acrylamide a hydrophilic polymer?

Partial hydrolysis occurs at elevated temperatures in aqueous media, converting some amide substituents to carboxylates. This hydrolysis thus makes the polymer particularly hydrophilic. The polymer produced from N,N-dimethylacrylamide resists hydrolysis. Copolymers of acrylamide include those derived from acrylic acid.